[SOLVED] Trigonometry test question

There are three rollers under a conveyor belt, and each roller has a radius of 8 centimeters. The rollers turn at a rate of 2 revolutions per second. What is the linear velocity of the conveyor belt? (the centimeters has to be converted into meters.)

the linear velocity of any point rotating about a fixed axis with an angular velocity of is where r is the distance between the point and axis.

The conveyor belt must be moving at the same speed as the rollers (at the point of contact ) therefore where r is the radius of the rollers i.e. 0.08 m. remember is the rate of change of the angle . the rollers turn 2 revolutions in a second .therefore they turn at the rate of per second .
impling .